Sylinider, The Snake God

Deathtouch, Lifelink, Delve, Darkness 3
( When this creature attacks, If
you control 3 or more black creatures
deal 3 damage to target creature)
{t}{b}{b}{b} put a darkness counter on this creature
{t}{b}{b}{w/b}{5} All creatures you control get
+3+3 and darkness 2 until end of turn